WatchService is a
class included in the standard Java nio package since version 7. WatchService is extremely useful when we need to trigger an action after an event happens to an object in a specific folder or set of folders.

The Ireland Hadoop User Group organized an event themed on Graph Databases. I was invited as OrientDB contributor. My talk “OrientDB: Unlock the Value of Document Data Relationships” was focused on how to combine the flexibility of documents with the power of graphs while incorporating object oriented paradigm concepts. I shared my experience with OrientDB presenting a real use case I worked on in the last year.

Many companies heavily rely on the functions of database that their daily business operations can not be executed if the database is not available, making database management and maintenance a critical component of their business models.

Hibernate provides a wide range of mappings to convert SQL data to Java objects and the other way around. In some circumstances, developers may need to define custom types to handle the mapping of a column to a specific type.
In the last years, along with the exploding growth of JavaScript, JSON has become the most popular data­-interchange format with lots of supporting libraries that make it easy to read and write models in JSON.
Jackson is a widely used high performance Java JSON data processing library.
Here I will show you how to create a custom Hibernate UserType that uses Jackson to map generic POJOs to a database column in a transparent fashion.